Clutch mechanism for dumb-waiters, &amp;c.



No. 896,421. PATENTED AUG. 18, 1908. A. SVENSON. CLUTCH MECHANISM FORDUMB WAITERS, 850

Z r I A TTORNEY to be operate ALBIN SVENSON, OF NEW YORK, N. Y.

CLUTCH MECHANISM FOR DUMB-WAITERS, 860.

Application filed November 12, 1907.

To all whom it may concem.

Be it known that I, ALBIN SvENsoN, a subject of the King of Sweden,residing at the borough of the Bronx, city of New York, in the countyand State of New York, have invented certain new and useful Improvementsin Clutch Mechanisms for Dumb-Waiters and the Like, of which thefollowing is a full, clear, and exact specification, reference being hadto the accompanying drawings and to the reference characters markedthereon.

My present invention has relation to clutch mechanisms for dumb-waiters,especially such as are employed in houses and apartments for domesticuses, but the improvements are equally applicable in connection withsimilar cars or carriers for other uses. Such a paratus is ordinarilyintended d by hand, but power may be applied if so desired.

The principal object of this invention is to simplify and improve theclutch mechanism, to make the parts few and simple and easy ofconstruction, not liable to get out of order and reliable. and efficientin use, easily located in place and operative to automatically effectthe stopping of the car either in its descent or ascent within its shaftwhenever its movements are not under control by the hand-rope or poweroperating connections.

Subordinate objects of the invention are to simplify the means forreleasing the clutch after the car has been automatically arrested bythe mechanism therefor, permitting the car to move until againautomatically arrested under similar conditions.

To accomplish the above specified objects and to secure other andfurther advantages in the matters of construction, operation, application, adjustment and use, my im rove- Inents involve certain newand usefu rela tive arrangements or combinations of parts, peculiaritiesof construction and principles of operation, as will be herein firstfully described and then pointed out in the claims.

The car, not shown, is usually counterweighted, as is well understood.When the load of the car exceeds the counterweight by too much, the caris liable to rapidly descend in its shaft, causing more orless damage;also, when the counterweight exceeds the weight of the car and its loadby too much, the car is liable to ascend rapidly and cause more orSpecification of Letters Patent.

Patented Aug. 18, 1908.

Serial No. 401,853.

less damage. The clutch mechanism is intended to overcome thesedifficulties and to check the car as soon as it commences to move toorapidly in either direction.

In the accompanying drawings forming part of this specification, Figure1 is a vertical view, partly in section and partly in elevation, showingmy improved clutch mechanism ready for use. elevation on a plane throughline 22 of Fig. 1 and at right angles with that figure. Fig. 3 is asection and elevation on a plane through line 33 of Fig. 1.. Fig. 4 is asectional elevation on a planethrough line 4-4 of Fig. 1; and Fig. 5 isa horizontal view of .a fragment partly in plan and partly in section ona plane through line 55 of Fig. 2. Fig. 6 is an axial section andelevation of the inner friction disk detached from the other parts, thesame being in the form of a ring.

In all these figures like reference characters, wherever they occur, areemployed to indicate corresponding parts.

A, A are the standards of any suitable frame or other support for theclutch mechanism. This frame may be of any size and form and it sustainsthe operating shaft, B,

Fig. 2 is a sectional on which is keyed the hand rope wheel, C, 1

side plates A and the pulley D is a ring, G,

sustained at a proper distance from the side plate A by suitable bolts,nuts and sleeves, as at a, a, by which the ring G may be adjusted to therequired distance and rigidly .held in place.

Loosely mounted upon the shaft B are two friction disks H and I, andthese are located between the ring G and the frame and are forced intocontact with the ring and the frame respectively when it is necessary toproduce the friction requisite for arresting the movement of the car.The disk H, in the form shown, is in the shape of a flat ring, itscentral part being open. Between the two disks is a bow, K, of which theextremities, b and 0, may be conveniently located in recesses providedfor them in the friction disks, but these recesses are not indispensableand might be omitted. Ordinarily this how rides flat between the twofriction disks, but when it is tilted or rocked by the mechanismprovided for the purpose, the portions 6 and c bear upon the frictiondisks and force them away from each. other and against the ring G andthe side plate A, causing sufficient friction to arrest the car.

To rock the bow K, a suitable yoke, as L, is secured upon the shaft B,its arms, I, Z, in the form shown, passing through an opening m, in thepulley D and straddling a lug or projection, n, on the bow K. As theshaft and thereby .the yoke L turns in one direction one of the arms Zwill strike the projection n and rock the bow K accordingly, theopposite side of the yoke bearing against the margin of the opening m inpulley D to cause the latter to turn with the shaft. At 0 is anotherprojection or lug on the bow K, and on the pulley D are two lugs orprojections, p, 1), one on either side of the projectiolg1 0 and bothcalculated to contact therewit At q is a rim on the disk I, but this rimmight be omitted.

When the bow is rocked and the friction disks thereby brought intooperation, one of the projections 12 of the pulley D comes in contactwith the projection 0, and this causes the pulley D and of course thecar connected therewith to be arrested or at least only permitted tomove very slowly, the then connected friction mechanism acting as abrake. To start the car again it will be necessary to apply power in theopposite direction, which is accomplished by pulling back upon the handrope wheel or otherwise reversing the power. Then the car may bepermitted to continue its movement being suitably controlled by themovement of the power wheel. The above refers chiefly to the downwardmovement of the car. A rapid movement of the car in the upwarddirection, the parts being in operative relation, would be similarlychecked but with less powerful effect, as the bow would not tilt so far.When the power wheel is reversed to release the car, the other of theprojections strikes the projection 0 and rocks the bow back slightly orto its normal position, thus relieving the pressure on the frictiondisks.

The two projections 0 and n are similar and located diametricallyopposite each other so that the yoke L may be shifted to engage witheither one or the other as may be preferred, thus providing for a rightor left hand arrangement of the dumb-waiter operating mechanism. Theprojections 0 and a are rigidly applied on the bow K and the projections19 and p are similarly applied on the pulley D, the former, 0 and n,eXtending through the central opening in disk H, as indicated in Figs. 1and 3.

Being constructed and arranged for operation substantially in accordancewith the foregoii'ig explanations, the improved device is of few andsimple parts, not liable to become disarranged or to get out of order,easily regulated to compensate for any possible wear, and is found toanswer all the purposes or objects of the invention herein beforealluded to.

Having now fully described my invention what I claim as new herein anddesire to secure by Letters Patent is:

1. In a device of the character herein set forth, the combination of theshaft, a roe pulley mounted on said shaft, friction dislis movableindependently of the shaft, stationary friction surfaces, a bow locatedbetween the disks for forcing said disks apart and against the frictionsurfaces, and a fork secured on the shaft for applying the force of thefriction to the rope pulley, substantially as and for the purposes setforth.

2. In a device of the character herein set forth, the combination of theshaft,the rope pulley mounted on said shaft, friction disks movableindependently of the shaft, stationary friction surfaces, a bow locatedbetween the friction disks and arranged to rock to force said disksapart and against the friction surfaces, a yoke secured upon the.

shaft and arranged to rock the bow, and a projection on the bow forarresting the rope pulley, substantially as and for the purposes setforth.

3. The combination of the shaft, rope pulley having projections thereon,stationary friction surfaces, movable friction disks loeated betweensaid surfaces, a rocking bowlocated between the friction disks andprovided with projections, and a yoke having arms for contact with oneof said projections, said yoke being secured on the shaft, substantiallyas and for the purposes set forth.

4. In a device of the character herein set forth, the combination withthe shaft and rope pulley mounted thereon, of a yoke having two armspassing through an opening in the rope pulley, friction disks, a rockingbow mounted between said disks and provided with a projection forcontact with the arms of the yoke, substantially as and for the purposesexplained.

5. The combination with the shaft, a rope pulley mounted thereon andprovided with rojections, a yoke having projecting arms, friction disks,and a rocking bow located between said disks and having diametricallyopposite projections for contact with the arms of the yoke and with theprojections on the rope pulley, substantially as and for the purposesset forth.

6. The combination of the shaft, a rope pulley mounted thereon andprovided with an opening and With projections, a yoke havparts beingarranged substantially as shown ing projecting arms assing through theand described. openlng in the rope pu ey, movable friction disks,stationary friction surfaces, a rocking ALBIN SVENSON.

bow located between the friction disks and Witnesses:

having diametrically opposite projections J. M. HOWARD,

for contact with the arms of the yoke and ROBERT H. ERNEST, With theprojections on the rope pulley, the l B. A. 1-1. SMITH.

